How Prototype Pollution Can Turn JavaScript Object Inheritance Into a Security Risk Understanding Prototype Pollution Attacks JavaScript is one of the most widely used programming languages in modern web development. From browser applications to backend systems running on Node.js, JavaScript objects are everywhere. This flexibility is one of JavaScript's biggest strengths. Developers can dynamically create objects, inherit properties, merge configuration data, and manipulate application state with relatively little code. But the same object model that makes JavaScript powerful can also create unexpected security risks. One of the most interesting examples is Prototype Pollution . Prototype pollution is a class of JavaScript security vulnerability in which attacker-controlled input can modify properties on an object's prototype. Because JavaScript objects can inherit properties from their pr...
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